Ash Grove Opens New Finish Mill at Durkee Plant, Expands Capacity

Ash Grove marked the opening of a new finish mill at its Durkee plant on December 15, in a ribbon cutting attended by state and local government officials, customers and employees. The upgrade was engineered to add 210,000 tons of annual cement production while holding clinker production steady, a configuration the company says will avoid a corresponding rise in CO2 emissions. The move signals both an immediate production boost and a longer term shift toward lower carbon cement blends.

The Durkee plant, Oregon's only cement plant, has been operating since 1979 and underwent a major expansion in 1998. It currently has capacity to produce more than one million tons of clinker per year, employs over 130 team members directly, and supports approximately 600 additional local jobs through transportation, services and regional supply chains. The new mill begins full operation following the ribbon cutting, with benefits expected across local construction, infrastructure and industrial markets.

Technically, the finish mill increases output by enabling a higher proportion of clinker substitutes such as limestone and natural pozzolans. Durkee recently acquired rights to a natural pozzolan source in Oregon and is developing products that integrate those materials. Using more substitutes reduces the carbon intensity of finished cement because clinker production is the most emissions intensive stage. For local builders and public works projects, greater availability of blended cements can translate into more supply choices and potentially lower transport costs if materials can be sourced from Durkee rather than more distant plants.

From a market perspective, the extra 210,000 tons of capacity is material for a region that relies on a single in state cement producer. Increased local supply may ease pressure on prices during peak construction periods and shorten lead times for projects ranging from road maintenance to private building. Policywise, the adjustment aligns with broader industry trends toward blended cements and emissions reductions, a trajectory that could intersect with state and federal climate and infrastructure priorities.

Economically, the investment reinforces Durkee as a long running industrial anchor for Baker County and eastern Oregon. The plant’s expansion preserves existing jobs, supports ancillary businesses in transport and services, and positions the facility to meet evolving demand for lower carbon construction materials in the years ahead.